Study on the Stability of Road Embankment Banding with River Bank

Abstract

Filled road embankment along riverbank or widen riverbank as road embankment is often used in the project of highway construction. The road embankment built along riverbank has what influences to the stability of riverbank, and has what characteristics on the stability, deformation and destroy mode to the road embankment. These are the main questions to be solved for the construction of river levee highway extent. Based on the results of local reconnaissance, in-situ test and laboratory experiment, a new finite element model is built to carry out the analogy calculation and the analysis of the stability of the riverbank and the road embankment under different water level and whether the road embankment is built. The calculation results indicate that: 1) the build of road embankment is propitious to enhance the stability of the riverbank. The safety factors are increased about 26%. 2) the embankment built along riverbank is easy to generate differential settlements and large settlement. The total settlement may increase 35% for the widen project of road embankment. 3) the road embankment may occur shear destroy on the slope from the river bank behind the road embankment. The seepage has little influence to the stability and cannot change the failure mode of the embankment. Numerical simulation can forecast the stability and the failure modes of the road embankment before the project built. Numerical simulation with the new mode is useful to the design of building road embankment along riverbank or widening the riverbank as road embankment.